CVE-2020-15078

Name: CVE-2020-15078
Creator: NVD / NIST
Published: 2021-04-26T14:15:08.623+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 5.11%

Last modified Jun 17, 2026

CVE-2020-15078 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.. EPSS estimates a 5.11% chance of exploitation in the next 30 days.

Description

OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

5.11%

91.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Openvpn	Openvpn	< 2.4.11
Openvpn	Openvpn	>= 2.5.0, < 2.5.2
Fedoraproject	Fedora	32
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	20.04
Canonical	Ubuntu Linux	20.10
Canonical	Ubuntu Linux	21.04
Debian	Debian Linux	9.0

References

Timeline

Published: Apr 26, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15078?

How severe is CVE-2020-15078?

CVE-2020-15078 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.11% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15078?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-15078?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST